Apparatus for controlling gas-conduits.



No. 813,577. PATENTED FEB. 27, 1906. R. N. OAKMAN.

APPARATUS FOR CONTROLLING GAS OONDUITS. APPLIOATION FILED JUNE 19, 1905.

7 |1 FlGl. FIGE.

i :i H '5. l 1 6' 72 3 i/ 9 3 4 73 i. 70 .4 70 76 9 1T\ 75 5 TIGZ WITNEOSES: :E'IGnG 4/; ATTORNEY RICHARD N. OAKMAN, OF NEW YORK, N. Y. I

APPARATUS FOR CONTROLLING GAS-CONDUITS.

Specification of Letters Patent.

Patented Feb. 27, 1906.

Applicatiml fil d June 19, 1905. Serial No. 265,884-

To all whom it may concern:

Be it known that I, RICHARD N. OAKMAN, a citizen of the United States, and a resident of the city, county, and State of New York, have invented a new and useful Improvement in Apparatuses for Controlling Gas-Conduits, of which the following is a full description.

In a former application now pending, filed on the 27th day of May, 1905, and bearing the Serial No. 262,567, I have shown and described a device for opening and closing the ward movement closes the lower port in the conduit when the body of the piston is over this port and opens the port in its backward movement when the rear end of the piston has passed over and beyond the port, thus leaving the passage of gas free through the cylinder. In the present device I use the same character of piston solid in the sense that it contains no throughway in or around the body, but difiers therefrom in that it has no slot or plane surface removed'from its periphery. I combine this piston with a duct leading from the rear end of the cylinder to the passage-wayto the burner and dispense entirely with devices for preventing the cylinder from turning.

The accompanying drawings illustrate the invention, of which Figure 1 is a vertical section of the device, showing the gas-ports open and a small duct or groove in the top of the cylinder leading to the passage-way to the burner; Fig. 2, a cross-section of cylinder on line a b, Fig. 1, showing small groove in the top of the cylinder Fig. 3, a vertical section showing piston at the other end of the cylinder with the ports closed, a slot in the upper side of the bore of the standard, and a hole through the end of cylinder leading to the slot in the standa: d; Fig. 4, a View of the end of cylinder as constructed in Fig. 3; Fig. 5, a plan of cylinder and piston, showing the upper gas-port in the cylinder and a slot through the cylinder "rom its end to the port; Fig. 6, a cross-section of cylinder 011 line 0 (Z of Fig. 5.

1 is a post or standard, having a socket 2 for attachment to a gas-pipe. Through the body of the standard is the bore 3, provided with a clear passage-way 6 to a burner 7. Within the bore is inserted the cylinder 8, provided with the ports 4 and 5, adjusted to correspond with the passage-way to the burner, and is also provided with a nozzle 9 to connect with any of the well-known de vices (not shown) for exhausting and compressing air or other fluid to reciprocate the piston 10, which is solid and closes ports 4 and 5 when impelled toward the rear of the cylinder or opens them. when withdrawn until its end has passed beyond the ports, as shown in Fig. 1. In the rear end of the cylinder and leading thence to the passage-way 6 is shown, Figs. 1 and 2, a small groove 11, which permits the air at that end of the cylinder to escape through passage-way 6 when the piston is impelled forward and allows it to enter again behind the piston when withdrawn. A duct 12 is also shown in Figs. 3 and 4, slightly varying from that of Fig. 1. This duct is cut in the bore of the standard and runs into the passage-way 6. When the duct is formed in this way, I cut a small hole 13 at the end of the cylinder through its wall, communicating with duct 13. The form I prefer, however, is that shown in Figs. 5 and 6, which shows a slot 14, cut through this wall of the cylinder from the port 4 to the rear end of the cylinder. This construction of the apparatus has many advantages. By making the piston solid (without a throughway) it may be made shorter, consequently lighter and more easily reciprocated. Having no part of its periphery removed, a well-fitted piston will close both of the ports 4 and 5, and thus make a more perfect stoppage of the flow of gas through those ports, and by combining a piston thus constructed with a duct leading from the end of the cylinder to the passage-way 6 dispenses with the necessity for preventing the piston from turning in the cylinder, as it will always present its full body to the ports in any event.

A pipe 15, having a small bore 16, leads from the socket 2' below the cylinder having its end 17, always lighted, located in the path of the gas from the burner 7.

hat I claim is V 1. In an apparatus for controlling gas-com duits, a cylinder having openings or ports,

communicating with a gas-conduit, and provided with a solid reciprocating piston, to close the ports when its body covers them, and to open the ports when its end has passed beyond them, in combination with a duct leading from the rear end of the cylinder to the gas-conduit.

2. In an apparatus for controlling gas-conduits, a cylinder having openings or ports communicating with a gas-conduit, in combination with a solid reciprocating piston to open and close the ports, said cylinder provided with a slot in its upper wall, extending from its upper gas-port to the rear end of the cylinder.

In testimony whereof I, said RICHARD OAKMAN, have signed my name to this specification, in the presence of two subscribing witnesses, this 17th day of June, 1905.

RICHARD N. OAKMAN.

Witnesses M. TURNER, HENRY SELIGMAN. 

